Engineering With more than 3000 waterpark projects located around the globe, with most of that growth has been at larger destination waterparks, Polin Waterparks also has had success in smaller, regional facilities and aquatic centers. Polin Waterparks’ additions help make the aquatic centers more enticing to families and encourage guests to spend more relaxing time at the facility, taking advantage of other services on the property such as retail and dining. The investment in a waterslide and water play feature is a small price considering the overall costs of building the hotel, to potentially add upwards of 10 - 20% in increased revenues.